A casting mold for the rear axle housing of a vehicle axle

Abstract

This utility model discloses a casting mold for a rear axle housing, relating to the field of casting mold technology. It includes a lower mold, an upper mold, and a sand core. The upper mold is mounted on top of the lower mold via a locking rod. The sand core is installed in the inner cavities of both the lower and upper molds. The two sand cores are used to form the rear axle housing cavity. Multiple connecting grooves are provided on both sides of the sand core. Auxiliary components are installed on both sides of the lower mold to assist in cooling the sides of the sand core. Limiting components are installed on the top of the auxiliary components. This utility model, through the coordinated arrangement of connecting grooves, auxiliary components, and limiting components, utilizes highly thermally conductive cooling strips and a circulating water cooling system to quickly dissipate heat from the sand core and the casting. Multiple cooling rods directly contact the connecting grooves on both sides of the sand core, achieving close-range cooling of both sides of the casting. This avoids defects such as shrinkage porosity and cracks caused by uneven cooling, improving the molding quality and mechanical properties of the rear axle housing.

Description

Technical Field

[0001] This utility model relates to the field of casting mold technology, and in particular to a casting mold for a rear axle housing of a vehicle axle. Background Technology

[0002] The rear axle housing is a crucial load-bearing component in a vehicle's transmission system, and its casting quality directly impacts the overall vehicle performance and lifespan. Currently, the casting process for rear axle housings typically involves using an upper mold, a lower mold, and an internal sand core to form a mold cavity for molten metal casting.

[0003] However, in practical applications, existing rear axle housing casting molds mostly rely on natural cooling for cooling, or simple cooling channels are set in the upper and lower molds to cool the top and bottom of the casting cavity. However, due to the complex structure of the rear axle housing, especially the areas on both sides of the sand core where heat is often concentrated, the cooling components are mostly fixed structures and cannot be flexibly adjusted according to the different arrangements of the sand core connecting grooves. This results in a significant reduction in cooling effect, slow natural cooling speed, and a tendency to generate internal stress or defects such as shrinkage porosity and cracks in the casting, affecting the casting yield. Utility Model Content

[0004] The purpose of this invention is to provide a casting mold for the rear axle housing of a vehicle axle, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a casting mold for a rear axle housing, comprising:

[0006] Lower mold;

[0007] The upper mold is mounted on top of the lower mold via a locking rod;

[0008] A sand core is installed in the inner cavity of the lower mold and the upper mold. The two sand cores are used to form the rear axle housing cavity. Multiple connecting grooves are opened on both sides of the sand core. Auxiliary components are installed on both sides of the lower mold respectively. The auxiliary components are used to assist in the cooling of the sand core. A limit component is installed on the top of the auxiliary components.

[0009] Preferably, cooling pipes are fixedly connected to the top of the lower mold and the upper mold respectively, and sealing grooves are provided on the opposite sides of the lower mold and the upper mold.

[0010] Preferably, the auxiliary component includes:

[0011] A fixed column is fixed to the side of the lower mold, and the limiting component is disposed in the inner cavity of the fixed column;

[0012] A cooling component, wherein the cooling component is installed in the inner cavity of the fixed column;

[0013] A cooling element, wherein multiple cooling elements are equidistantly installed in the middle of the fixed column, the cooling elements being used to cool the sides of the sand core;

[0014] A connecting pipe is fixedly inserted into the bottom of a fixed column, and the connecting pipe is fixedly connected to the outer wall of an adjacent cooling pipe.

[0015] Preferably, the cooling component includes:

[0016] Cooling strips are fixedly embedded in the middle of the fixed column;

[0017] A plurality of sliding holes are equidistantly provided on the top of the cooling strip, and the cooling element slides within the inner cavity of the sliding holes;

[0018] Cooling holes are provided in the middle of the cooling strip, and a connecting tube is fixedly inserted into the bottom of the cooling strip. The connecting tube communicates with the inner cavity of the cooling holes.

[0019] Preferably, the cooling element includes:

[0020] A cooling rod is slidably inserted through the middle of a fixed column, and the cooling rod is slidably connected to the inner cavity of an adjacent sliding hole;

[0021] The slots are equidistantly provided on the top of the cooling rod, and the limiting component is used for engaging and locking within the slot cavity.

[0022] Preferably, the cooling rod is fitted into the inner cavity of the adjacent connecting groove, and the cooling rod is used to assist in the cooling of the rear axle housing during molding.

[0023] Preferably, the limiting component includes:

[0024] A limiting groove is provided at the top of the fixed column;

[0025] A pull rod, which is slidably inserted into the top of the fixed column, and is slidably connected to the inner cavity of the limiting groove;

[0026] A locking strip, which is fixed to the bottom of the pull rod, and the locking strip slides into the inner cavity of multiple adjacent locking slots;

[0027] A fixing plate that slides on the inner wall of a limiting groove, and a pull rod that is fixedly connected to the middle of the fixing plate;

[0028] Compression springs, multiple of which are fixed to the top of the fixed plate;

[0029] A positioning rod is sleeved inside the compression spring, and the positioning rod is slidably inserted into both sides of the fixing plate.

[0030] Preferably, the top of the positioning rod is fixedly connected to the top of the inner wall of the limiting groove, and the top of the compression spring is fixedly connected to the top of the inner wall of the limiting groove.

[0031] The technical effects and advantages of this utility model are as follows:

[0032] This invention utilizes a combination of connecting grooves, auxiliary components, and limiting components. By employing highly thermally conductive cooling strips and a circulating water cooling system, heat is rapidly dissipated from the sand core and casting. Multiple cooling rods directly engage with the connecting grooves on both sides of the sand core, achieving close-range cooling of both sides of the casting. This avoids defects such as shrinkage and cracks caused by uneven cooling, improving the molding quality and mechanical properties of the rear axle housing. The limiting components ensure that the retaining strips are securely engaged in the slots at the top of the cooling rods, preventing displacement due to vibration or molten metal impact during casting and ensuring cooling stability. Furthermore, it prevents excessive compression of the cooling rods from damaging the sand core, thus increasing the casting yield. Attached Figure Description

[0033] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0034] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0035] Figure 2 This is a schematic diagram of the structure of the sand core section of this utility model;

[0036] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0037] Figure 4 This is a side sectional view of the fixing column of this utility model.

[0038] Figure 5 For the present utility model Figure 4 Enlarged structural diagram at point B.

[0039] In the attached diagram: 100, lower mold; 200, upper mold; 300, sand core; 400, connecting groove; 500, auxiliary component; 501, fixing column; 502, cooling component; 521, cooling strip; 522, sliding hole; 523, cooling hole; 503, cooling component; 531, cooling rod; 532, slot; 504, connecting pipe; 600, limiting component; 601, limiting groove; 602, pull rod; 603, locking strip; 604, fixing plate; 605, compression spring; 606, positioning rod; 700, cooling pipe; 800, sealing groove. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] This utility model provides, for example Figures 1-5 The image shows a casting mold for the rear axle housing of a vehicle axle.

[0042] Example 1: Lower mold 100, upper mold 200, and sand core 300. The upper mold 200 is installed on top of the lower mold 100 via a locking rod. The sand core 300 is installed in the inner cavity of the lower mold 100 and the upper mold 200. The two sand cores 300 are used to form the rear axle housing cavity. Molten metal is poured through the pouring port on top of the upper mold 200 to cast the rear axle housing. Multiple connecting grooves 400 are provided on both sides of the sand core 300. The ends of the multiple connecting grooves 400 are equidistant from the sand core forming cavities of different structures, resulting in the multiple connecting grooves 400 being arranged in different structures. Auxiliary components 500 are installed on both sides of the lower mold 100 respectively. The auxiliary components 500 are used to assist in cooling the two sides of the sand core 300. A limit component 600 is installed on the top of the auxiliary components 500.

[0043] The auxiliary component 500 includes a fixed column 501, a cooling component 502, a cooling component 503, and a connecting pipe 504. The fixed column 501 is fixed to the side of the lower mold 100. The limiting component 600 is disposed in the inner cavity of the fixed column 501. The cooling component 502 is installed in the inner cavity of the fixed column 501. Multiple cooling components 503 are equidistantly installed in the middle of the fixed column 501. The cooling components 503 are used to cool the side of the sand core 300 and to assist in the rapid cooling of the rear axle housing. The connecting pipe 504 is fixedly inserted into the bottom of the fixed column 501 and is used for the input and output of cooling circulating water.

[0044] Specifically, the cooling component 502 includes a cooling strip 521, a sliding hole 522, and a cooling hole 523. The cooling strip 521 is fixedly embedded in the middle of the fixed post 501. The cooling strip 521 is a thermally conductive aluminum block structure. Multiple sliding holes 522 are equidistantly opened on the top of the cooling strip 521. The cooling component 503 slides in the inner cavity of the sliding hole 522. The opening of the sliding hole 522 facilitates heat conduction of the cooling component 503 through the inner wall of the sliding hole 522. The cooling hole 523 is opened in the middle of the cooling strip 521. The connecting pipe 504 is fixedly inserted into the bottom of the cooling strip 521. The connecting pipe 504 communicates with the inner cavity of the cooling hole 523. The opening of the cooling hole 523 allows the circulating water to carry away the heat on the cooling strip 521, facilitating the transfer of heat from the multiple cooling components 503 to the sand core 300, thus facilitating rapid cooling of the sand core.

[0045] More specifically, the cooling component 503 includes a cooling rod 531 and a slot 532. The cooling rod 531 is an aluminum strip with good thermal conductivity. The cooling rod 531 is slidably inserted into the middle of the fixed post 501. The cooling rod 531 is slidably connected to the inner cavity of the adjacent sliding hole 522. The cooling rod 531 is in contact with the inner cavity of the adjacent connecting groove 400. The cooling rod 531 is used to assist in the cooling of the rear axle housing during molding. Multiple slots 532 are equidistantly opened on the top of the cooling rod 531. The limiting component 600 is used for the engagement and locking of the inner cavity of the slot 532. Through the limiting component 600, the multiple cooling rods 531 are limited and locked, preventing the compression of the cooling rods 531, reducing damage to the casting mold cavity, and improving the stability of the multiple cooling components 503 in assisting the cooling of the sand core 300.

[0046] Furthermore, the limiting component 600 includes a limiting groove 601, a pull rod 602, a retaining strip 603, a fixing plate 604, a compression spring 605, and a positioning rod 606. The limiting groove 601 is formed at the top of the fixing post 501. The pull rod 602 slides through the top of the fixing post 501 and has an inverted U-shaped handle structure. The pull rod 602 is slidably connected to the inner cavity of the limiting groove 601. The retaining strip 603 is fixed to the bottom of the pull rod 602 and slidably engages with the inner cavities of multiple adjacent retaining slots 532. By manually pulling the pull rod 602 upward, the retaining strip 603 can slide out of multiple retaining slots 532, facilitating the adjustment of multiple cooling rods 531 according to different mold cavity structures. The retaining strip 603 is slidably connected to the top of the cooling strip 521. The fixing plate 604 slides in the limiting groove. The inner wall of 601 is fixedly connected to the middle of the tie rod 602 and the fixed plate 604. Multiple compression springs 605 are fixed to the top of the fixed plate 604. The top of the compression springs 605 is fixedly connected to the top of the inner wall of the limiting groove 601. The positioning rod 606 is sleeved in the inner cavity of the compression spring 605. The positioning rod 606 is slidably inserted into both sides of the fixed plate 604. The top of the positioning rod 606 is fixedly connected to the top of the inner wall of the limiting groove 601. By pulling the tie rod 602, the fixed plate 604 and the locking strip 603 can move synchronously, so that the compression spring 605 can be compressed and elastically restored. The positioning rod 606 is designed to improve the stability of the compression spring 605 and the sliding stability of the tie rod 602. It also makes it easier for the locking strip 603 to limit and lock the multiple cooling rods 531.

[0047] Example 2: Cooling pipes 700 are fixedly connected to the top of the lower mold 100 and the upper mold 200 respectively. The connecting pipe 504 is fixedly connected to the outer wall of the adjacent cooling pipe 700. A sealing groove 800 is provided on the opposite side of the lower mold 100 and the upper mold 200. By injecting sealant into the inner cavity of the sealing groove 800, the stability of the seal between the lower mold 100 and the upper mold 200 can be improved, which facilitates the stable casting of the rear axle housing of the vehicle axle.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A casting mold for a rear axle housing of a vehicle axle, characterized in that, include: Lower mold (100); The upper mold (200) is mounted on top of the lower mold (100) by a locking rod; A sand core (300) is installed in the inner cavity of the lower mold (100) and the upper mold (200). The two sand cores (300) are used to form the rear axle housing cavity. Multiple connecting grooves (400) are opened on both sides of the sand core (300). Auxiliary components (500) are respectively installed on both sides of the lower mold (100). The auxiliary components (500) are used to assist in the cooling of both sides of the sand core (300). A limiting component (600) is installed on the top of the auxiliary components (500).

2. The casting mold for a rear axle housing according to claim 1, characterized in that, Cooling pipes (700) are fixedly connected to the top of the lower mold (100) and the upper mold (200), respectively. Sealing grooves (800) are opened on the opposite side of the lower mold (100) and the upper mold (200).

3. The casting mold for a rear axle housing according to claim 2, characterized in that, The auxiliary component (500) includes: A fixed post (501) is fixed to the side of the lower mold (100), and a limiting component (600) is disposed in the inner cavity of the fixed post (501); Cooling component (502), the cooling component (502) is installed in the inner cavity of the fixed column (501); Cooling element (503), a plurality of cooling elements (503) are equidistantly installed in the middle of the fixed column (501), the cooling elements (503) are used to cool the side of the sand core (300); A connecting pipe (504) is fixedly inserted into the bottom of a fixed column (501), and the connecting pipe (504) is fixedly connected to the outer wall of an adjacent cooling pipe (700).

4. The casting mold for a rear axle housing according to claim 3, characterized in that, The cooling component (502) includes: Cooling strip (521), the cooling strip (521) is fixedly embedded in the middle of the fixed column (501); Sliding holes (522), a plurality of the sliding holes (522) are equally spaced on the top of the cooling strip (521), and the cooling element (503) slides in the inner cavity of the sliding holes (522); Cooling hole (523) is opened in the middle of cooling strip (521), and connecting pipe (504) is fixedly inserted into the bottom of cooling strip (521). The connecting pipe (504) communicates with the inner cavity of cooling hole (523).

5. The casting mold for a rear axle housing according to claim 4, characterized in that, The cooling component (503) includes: Cooling rod (531), which slides through the middle of fixed column (501), and is slidably connected to the inner cavity of adjacent sliding hole (522); The slots (532) are equidistantly provided on the top of the cooling rod (531), and the limiting component (600) is used for engaging the inner cavity of the slots (532).

6. The casting mold for a rear axle housing according to claim 5, characterized in that, The cooling rod (531) fits into the inner cavity of the adjacent connecting groove (400), and the cooling rod (531) is used to assist in the cooling of the rear axle housing during molding.

7. The casting mold for a rear axle housing according to claim 5, characterized in that, The limiting component (600) includes: A limiting groove (601) is provided at the top of the fixing post (501); A pull rod (602) is slidably inserted into the top of a fixed column (501), and the pull rod (602) is slidably connected to the inner cavity of a limiting groove (601); A locking strip (603) is fixed to the bottom of the pull rod (602), and the locking strip (603) is slidably engaged with the inner cavity of a plurality of adjacent locking slots (532); A fixing plate (604) slides on the inner wall of the limiting groove (601), and the pull rod (602) is fixedly connected to the middle of the fixing plate (604). Compression springs (605), a plurality of said compression springs (605) are fixed to the top of the fixing plate (604); The positioning rod (606) is sleeved in the inner cavity of the compression spring (605), and the positioning rod (606) is slidably inserted into both sides of the fixing plate (604).

8. The casting mold for a rear axle housing according to claim 7, characterized in that, The top of the positioning rod (606) is fixedly connected to the top of the inner wall of the limiting groove (601), and the top of the compression spring (605) is fixedly connected to the top of the inner wall of the limiting groove (601).

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